JP2002232798A - Broadcast receiver and its control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a broadcast receiver and its control method in consideration of user's easy grasping of the contents of subtitles by enabling to leave the subtitles previously displayed on a screen without eliminating them even if new subtitles are displayed. SOLUTION: In the receiver, a display screen is divided into a video display area A to display video based on the TV broadcast programs and a subtitle display area B to display the subtitles. In a state that the subtitles have been updated, both of the subtitles based on the updated subtitle data and the subtitles displayed before the update are displayed in the area B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcast receiving apparatus for receiving, for example, digital television broadcasts and a control method therefor, and more particularly to an improved subtitle display mode in a data broadcast.

[0002]

2. Description of the Related Art As is well known, digital television broadcasting has recently been started, and a variety of information can be transmitted and received by a corresponding digital television broadcast receiving apparatus in addition to viewing video and audio. It is possible to get.

[0003] In particular, in this digital television broadcasting, subtitles related to the contents of the television broadcasting program can be displayed on the display screen of the television broadcasting program by data broadcasting.

FIG. 5 shows such a conventional digital television broadcast receiving apparatus. That is, the digital television broadcast wave received by the antenna 11 is supplied to the television signal receiving circuit 12 and subjected to demodulation processing, thereby being separated into a video signal component and an audio signal component.

[0005] Of these, the audio signal component is supplied to an audio demodulation and amplification circuit 13 and subjected to demodulation and amplification processing.
The sound is supplied to a speaker 16 via a sound switching circuit 14 and a sound amplification circuit 15 which will be described later.

The video signal component is supplied to a video signal demodulation circuit 17 and subjected to a demodulation process, and then is displayed on a screen display by a display device 20 via a video switching circuit 18 and a video amplification circuit 19 to be described later. Provided.

Further, the video signal component is supplied to a data demodulation circuit 21 to be used for extracting data for displaying subtitles. The data output from the data demodulation circuit 21 is stored in a data memory
3 is held.

The caption data held in the data memory 23 is converted into data for screen display using a character generator 24 as necessary, and is recorded in a display memory 26 via a display processing circuit 25.

The subtitle video data recorded in the display memory 26 is converted to RGB signals by the display processing circuit 25 and supplied to the video switching circuit 18. The additional sound data included in the subtitle data is converted into an additional sound signal by the additional sound decoder 27 and supplied to the audio switching circuit 14.

Here, the video switching circuit 18 appropriately switches between a video signal of a television broadcast program output from the video signal demodulation circuit 17 and a subtitle video signal output from the display processing circuit 25, The screen of the television broadcast program and the subtitles are displayed on the display device 20 in a superimposed manner.

The audio switching circuit 14 appropriately switches between an audio signal of a television broadcast program output from the audio demodulation and amplification circuit 13 and an audio signal of a data broadcast output from the additional sound decoder 27, The speaker 16 can play the sound of the television broadcast program and the sound of the data broadcast.

The operation of the above digital television broadcast receiving apparatus is entirely performed by a CPU (Central Processing Unit).
nit) 28. This CPU
28 is a RAM (Random Access Memory) based on a program stored in a ROM (Read Only Memory) 29
30 is driven as a work memory.

The CPU 28 receives user operation information from the remote controller 31 via the remote controller receiving unit 32 and the control microcomputer 33, thereby reflecting the information on the control operation.

[0014]

By the way, in the conventional digital television broadcast receiver as described above, FIG.
As shown in (a), (b), and (c), a display mode in which a subtitle already displayed is deleted and a new subtitle is displayed in accordance with the progress of the screen of the television broadcast program is repeated.

For this reason, for example, even when the viewer looks away from the screen or when the currently displayed subtitle does not finish reading, the subtitle is often switched to the next subtitle. There is a problem that it is difficult to grasp the contents, and it is difficult to enjoy the television broadcast program sufficiently.

As a known technique relating to the above-mentioned digital television broadcast receiving apparatus, for example, Japanese Unexamined Patent Publication No.
Japanese Patent Application Laid-Open No. 191789/1992. However, in this method, the subtitle is reduced by 1 / n in the horizontal direction by reading the character signal from the display memory at an n-times clock, and it is not possible to solve the above-described conventional problem. No description has been made.

Therefore, the present invention has been made in consideration of the above circumstances, and even when a new subtitle is displayed, it is possible to leave the previously displayed subtitle on the screen without erasing the subtitle. It is an object of the present invention to provide an extremely good broadcast receiving apparatus and a control method thereof, which take into account the contents of subtitles so that the user can easily grasp the contents.

[0018]

SUMMARY OF THE INVENTION A broadcast receiving apparatus according to the present invention is intended for receiving a broadcast signal including video data and subtitle data and displaying the video and subtitles simultaneously on a display screen.

A screen dividing means for simultaneously forming a video display area for displaying a video based on the video data and a subtitle display area for displaying a subtitle based on the subtitle data on the display screen; In a state where the data is updated, in the subtitle display area, the subtitle based on the updated subtitle data and the subtitle displayed before the update are provided with control means for displaying both together. is there.

Further, the method of controlling a broadcast receiving apparatus according to the present invention is arranged such that a broadcast receiving apparatus that receives a broadcast signal including video data and subtitle data displays video and subtitles simultaneously on a display screen. It is intended for a method of controlling.

A screen dividing step of forming a video display area for displaying a video based on the video data and a subtitle display area for displaying a subtitle based on the subtitle data on the display screen; In a state where the data is updated, in the subtitle display area, the subtitle based on the updated subtitle data and the subtitle that was displayed before being updated are provided with a control step of displaying both together. is there.

According to the above configuration and method, even if a subtitle is updated, the previous subtitle is displayed without being erased, so that the viewer can easily grasp the contents of the subtitle. Therefore, the user can fully enjoy the television broadcast program with a margin.

[0023]

Embodiments of the present invention will be described below in detail with reference to the drawings. First, FIG.
(A), (b), and (c) each show a display screen of the digital television broadcast receiver described in this embodiment.

That is, in the examples shown in FIGS. 1A, 1B and 1C, the display screen is divided into two parts from the center in the horizontal direction.
A television broadcast program is horizontally compressed and displayed in a left display area A, and subtitles are horizontally compressed and displayed in a right display area B.

Here, it is assumed that the screen of the television broadcast program advances in the order shown in FIGS. 1 (a), 1 (b) and 1 (c). Then, first, in FIG. 1A, a predetermined screen is displayed in the left display area A, and a subtitle (caption character 1) corresponding to the screen is horizontally displayed in the right display area B.

Then, when it is time to display the next subtitle, a screen corresponding to the next subtitle is displayed in the left display area A and the right display area B as shown in FIG.
At the same time, the previous subtitle (subtitle character 1) is displayed horizontally with the next subtitle (subtitle character 2) without being erased. In this case, the previous subtitle (subtitle character 1) is moved upward by one line, and the next subtitle (subtitle character 2) is displayed below it.

Further, when it is time to display the next subtitle, a screen corresponding to the next subtitle is displayed in the left display area A and the right display area B as shown in FIG.
Then, the previous subtitle (subtitle character 1) and (subtitle character 2) are not erased and are displayed horizontally with the next subtitle (subtitle character 3). In this case, the previous subtitle (subtitle character 1) and (subtitle character 2) are moved upward by one line, and the next subtitle (subtitle character 3) is displayed below it.

FIG. 2 shows a digital television broadcast receiver for realizing the above-described display mode. 2, the same parts as those in FIG. 5 are denoted by the same reference numerals.

That is, the video signal of the television broadcast program output from the video signal demodulation circuit 17 is supplied to the video compression circuit 34 and can be compressed in the horizontal direction. Thereby, FIGS. 1 (a), (b),
As shown in the display area A on the left side of (c), the television broadcast program can be displayed on the screen by compressing it in half in the horizontal direction.

The video signal of the caption output from the display processing circuit 25 can be subjected to horizontal compression processing by a horizontal compression circuit 35. This allows
As shown in the display area B on the right side of FIGS. 1A, 1B, and 1C, the caption can be displayed on the screen by compressing the caption in half in the horizontal direction.

For the subtitles to be displayed without being erased in the right display area B, subtitle data held in the data memory 23 or the display memory 26 is used.

FIG. 3 is a flowchart summarizing a series of operations for leaving a previously displayed subtitle on the screen without deleting it even when a new subtitle is displayed as described above. First, when started (step S11), the CPU 28 determines whether or not subtitles are currently being displayed in step S12. If it is determined that subtitles are not being displayed (NO), the CPU 28 ends the process (step S13). ) Is done.

If it is determined in step S12 that subtitles are being displayed (YES), the CPU 28 determines in step S14 whether subtitle data has been updated.
If it is determined that the subtitle has not been updated (NO), it is determined in step S15 whether or not the display of the subtitle has ended.

When it is determined that the subtitle display has not been completed (NO), the CPU 28 returns to the process of step S12, and when it is determined that the subtitle display has been completed (YES), the CPU 28 proceeds to step S16. Then, a predetermined end process is executed, and the process is ended (step S17).

If it is determined in step S14 that the subtitle data has been updated (YES), the CPU 28
Calculates the number n of caption lines from the updated caption data in step S18.

Thereafter, the CPU 28 proceeds to step S19.
Then, if the updated n-line subtitles are displayed together with the already displayed subtitles in the display area B on the right side of the display screen, it is determined whether or not the captions protrude from the display area B.

Then, the CPU 28 determines that the subtitle is in the display area B.
If it is determined that the subtitle does not run off (NO), the subtitle displayed earlier is moved upward by n lines, which is the number of lines of the updated subtitle, and displayed in step S20.

Thereafter, the CPU 28 proceeds to step S21.
Then, the subtitle display of n lines from the bottom of the display area B is erased, the subtitle of the latest n lines is displayed in the erased portion in step S22, and the process returns to step S12.

If it is determined in step S19 that the caption is outside the display area B (YES), the CPU
In step S23, the subtitles are shifted upward by n lines and displayed up to the range not protruding from the display area B in the new order, including the latest n-line subtitles to be updated, in step S23. Transition.

According to the above-described embodiment, even if a subtitle is updated, the previous subtitle is displayed without being erased, so that the viewer can easily grasp the contents of the subtitle. It becomes possible to enjoy television broadcast programs with plenty of time.

Here, in the above-described embodiment, the horizontally written subtitle is moved upward in the display area B so that the latest subtitle is always displayed at the bottom. The horizontally written subtitle may be moved downward in the display area B so that the latest subtitle is always displayed at the top.

In the above-described embodiment, the display screen is horizontally divided into two parts from the center, and the display area A on the left side
The television broadcast program is displayed on the display area B and the subtitles are displayed in the display area B on the right side. However, the present invention is not limited to this, and both the display area of the television broadcast program and the display area of the subtitles are displayed on the same display screen. It just needs to be.

Therefore, the television broadcast program and the subtitles can be compressed or expanded not only in the horizontal direction but also arbitrarily in the horizontal and vertical directions according to their display areas.

Further, the timing for erasing the subtitle display includes a method of erasing the old subtitle when the display area of the subtitle becomes full, and a method of erasing the old subtitle when a predetermined number of lines (for example, about 4 lines) is reached. A method of erasing, a method of erasing from old subtitles after a predetermined time elapses, and the like, and a combination of these methods are also conceivable.

Also, as the subtitles are changed from the latest subtitles to the old ones, the subtitles may be distinguished by changing the character color, the background color, the border, and the like. In this case, a method of changing the luminance of the subtitle stepwise is visually effective.

Further, subtitles are not limited to horizontal writing.
As shown in (a), (b), and (c), it goes without saying that vertical writing may be used. First, in FIG.
A predetermined screen is displayed on the left display area A, and a subtitle (caption character 1) corresponding to the screen is displayed on the right display area B.
Is displayed vertically on the right end of.

Then, when it is time to display the next subtitle, a screen corresponding to the next subtitle is displayed in the left display area A and the right display area B as shown in FIG.
At the same time, the previous subtitle (subtitle character 1) is not erased and is displayed in vertical writing together with the next subtitle (subtitle character 2). In this case, the previous subtitle (subtitle character 1) is moved leftward by one line, and the next subtitle (subtitle character 2) is displayed on the right side.

Further, when it is time to display the next subtitle, a screen corresponding to the next subtitle is displayed in the left display area A and the right display area B as shown in FIG.
At the same time, the previous subtitle (subtitle character 1) and (subtitle character 2) are not erased, but are displayed vertically with the next subtitle (subtitle character 3). In this case, the previous subtitle (subtitle character 1) and (subtitle character 2) are moved leftward by one line, and the next subtitle (subtitle character 3) is displayed on the right side.

On the contrary, it is also possible to move the vertically written caption rightward in the display area B so that the latest caption is always displayed on the left end of the display area B.

Here, in the above-described embodiment, a broadcast receiving apparatus that receives digital television broadcasts and displays subtitles by data broadcasts has been described. However, the present invention is not limited to this, and for example, analog television broadcasts It is needless to say that the present invention can also be applied to a broadcast receiving apparatus that displays subtitles by teletext.

It should be noted that the present invention is not limited to the above-described embodiment, and can be variously modified and implemented without departing from the scope of the invention.

[0052]

As described in detail above, according to the present invention,
Even if a new subtitle is displayed, it is possible to leave the previously displayed subtitle on the screen without erasing it, taking into account the content of the subtitle easily A broadcast receiving device and a control method thereof can be provided.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an embodiment of a broadcast receiving apparatus and a control method thereof according to the present invention, and is a view illustrating a display form on a screen.

FIG. 2 is a block diagram showing a digital television broadcast receiving apparatus according to the embodiment;

FIG. 3 is an exemplary flowchart shown in order to explain a series of subtitle display operations in the embodiment;

FIG. 4 is a view shown for explaining a modification of the embodiment.

FIG. 5 is a block diagram showing a conventional digital television broadcast receiving apparatus.

FIG. 6 is a view for explaining a subtitle display mode in the conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Antenna, 12 ... Television signal receiving circuit, 13 ... Audio demodulation amplification circuit, 14 ... Audio switching circuit, 15 ... Audio amplification circuit, 16 ... Speaker, 17 ... Video signal demodulation circuit, 18 ... Video switching circuit, 19 ... Video amplifier circuit, 20 display device, 21 data demodulation circuit, 22 decoding processing unit, 23 data memory, 24 character generator, 25 display processing circuit, 26 display memory, 27 additional sound decoder, 28 ... CPU, 29 ... ROM, 30 ... RAM, 31 ... Remote controller, 32 ... Remote controller receiving unit, 33 ... Control microcomputer, 34 ... Video compression circuit, 35 ... Horizontal compression circuit.

Claims (10)

[Claims] 1. A broadcast receiving apparatus for receiving a broadcast signal including video data and subtitle data and simultaneously displaying the video and subtitles on a display screen, wherein a video based on the video data is displayed on the display screen. A video display area for displaying, and a subtitle display area for displaying subtitles based on the subtitle data, screen division means for forming the subtitle data together, in a state where the subtitle data is updated, in the subtitle display area, A broadcast receiving apparatus comprising: control means for displaying both a caption based on updated caption data and a caption displayed before updating, together with the caption. 2. The image processing device according to claim 1, wherein the screen dividing unit performs compression or decompression processing on the image displayed on the screen based on the image data, thereby forming the image display area on the display screen. The subtitle display area formed in a portion other than the video display area on a display screen, comprising a subtitle processing unit that performs compression or decompression processing on the subtitle displayed on the screen based on the subtitle data and displays the subtitle. The broadcast receiving device according to claim 1, wherein 3. The control means, in a state where the subtitle data is updated, a subtitle displayed before the update,
2. The broadcast receiving apparatus according to claim 1, wherein the broadcast receiving apparatus is moved in any direction of up, down, left, and right, and the updated subtitle is displayed in an area after the moving. 4. The subtitle display area has no space for additionally displaying a new subtitle, a state in which the displayed subtitle has reached a predetermined number of lines, 2. The broadcast receiving apparatus according to claim 1, wherein the subtitles being displayed are deleted in a preset order in a state where the display time has passed a preset predetermined time. 5. The control means according to new and old subtitles displayed in the subtitle display area, their character colors,
2. The broadcast receiving apparatus according to claim 1, wherein any one of background color, border, and luminance is changed. 6. A method for controlling a broadcast receiving apparatus that controls a broadcast receiving apparatus that receives a broadcast signal including video data and subtitle data to simultaneously display video and subtitles on a display screen, On the screen, a video display area for displaying a video based on the video data, and a subtitle display area for displaying a subtitle based on the subtitle data, a screen division step of forming together, the subtitle data is updated In a state where the subtitles are displayed in the subtitle display area together with the subtitles based on the updated subtitle data and the subtitles that were displayed before being updated. How to control the device. 7. An image processing step of forming the image display area on the display screen by performing compression or decompression processing on an image displayed on the screen based on the image data; A subtitle display area formed in a portion other than the video display area on a display screen, a subtitle processing step of performing a compression or decompression process on the subtitle displayed on the screen based on the subtitle data and displaying the subtitle. The method for controlling a broadcast receiving apparatus according to claim 6, wherein 8. The control step, in a state where the subtitle data is updated, a subtitle displayed before being updated,
The method according to claim 6, wherein the subtitles are moved in any direction of up, down, left, and right, and the updated subtitles are displayed in an area after the movement. 9. The method according to claim 9, wherein the subtitle display area has no space for additionally displaying a new subtitle, the subtitle being displayed has reached a predetermined number of lines, 7. The broadcast receiving apparatus according to claim 6, wherein the subtitles being displayed are deleted in a preset order in a state in which a display time has passed a predetermined time set in advance. Control method. 10. The method according to claim 1, wherein the control step changes any one of a character color, a background color, a border, and a luminance according to the new and old subtitles displayed in the subtitle display area. 7. The method for controlling a broadcast receiving device according to claim 6.